What is the CVSS score of CVE-2019-3396?

CVE-2019-3396 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 94.5%.

Is there a public PoC exploit available for CVE-2019-3396?

Yes, a public proof-of-concept exploit is available for CVE-2019-3396. Prioritise patching immediately. EPSS: 94.5%.

How to fix or mitigate CVE-2019-3396?

Within 24 hours: Identify all affected systems running Atlassian Confluence Server and apply vendor patches immediately. Review file handling controls and restrict upload directories.

Atlassian Confluence Server CVE-2019-3396

CRITICAL

Path Traversal (CWE-22)

2019-03-25 security@atlassian.com

9.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-22 OWASP Top 10:2025 A01:2021 - Broken Access Control ASVS 5.0 V4 - Access Control Authorization enforcement, RBAC validation MITRE ATT&CK 2 techniques across 2 tactics: Discovery, Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	Critical risk (CVSS 9.8, EPSS 94.5%). Confluence instances frequently contain sensitive corporate documentation, project plans, and credentials. Mass exploitation campaigns targeted internet-facing Confluence servers for cryptomining and ransomware deployment.
Exploit ScenarioDerived	An attacker sends a crafted URL parameter to the Widget Connector macro that includes Velocity template injection payloads. The template engine evaluates the injected code, executing Runtime.exec() to download and run a cryptominer or establish a reverse shell for ransomware deployment.

Act Now Prioritize within 24-48h. Why: In CISA KEV with patch available.

Exploited in the wild (CISA KEV) Patch available 94.5% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 26, 2026

Atlassian Confluence Server Widget Connector macro contains a path traversal and server-side template injection vulnerability enabling unauthenticated remote code execution through crafted URLs.

Earlier versions of this analysis (1)

v1 Mar 26, 2026 - 11:19 CVSS 9.8

The Widget Connector macro in Atlassian Confluence Server allows unauthenticated attackers to achieve path traversal and server-side template injection, leading to remote code execution through crafted request URLs.

RemediationAI

Upgrade Confluence Server immediately. Restrict external access to Confluence. Disable the Widget Connector macro if not needed. Check for signs of compromise including cryptominers and web shells.

Affected ProductsAI

Atlassian Confluence Server before 6.6.12 Atlassian Confluence Server 6.7.0 before 6.12.3 Atlassian Confluence Server 6.13.0 before 6.13.3 Atlassian Confluence Server 6.14.0 before 6.14.2

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The CWE-22 path traversal in the Widget Connector's URL parameter allows injection of server-side template directives. The Velocity template engine processes the injected code, enabling execution of arbitrary Java methods and OS commands on the Confluence server.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Oct 24, 2025 - 13:39 cisa

CISA KEV

PoC Detected

Oct 24, 2025 - 13:39 vuln.today

Public exploit code

Patch released

Oct 24, 2025 - 13:39 nvd

Patch available

CVE Published

Mar 25, 2019 - 19:29 nvd

CRITICAL 9.8

DescriptionCVE.org

The Widget Connector macro in Atlassian Confluence Server before version 6.6.12 (the fixed version for 6.6.x), from version 6.7.0 before 6.12.3 (the fixed version for 6.12.x), from version 6.13.0 before 6.13.3 (the fixed version for 6.13.x), and from version 6.14.0 before 6.14.2 (the fixed version for 6.14.x), allows remote attackers to achieve path traversal and remote code execution on a Confluence Server or Data Center instance via server-side template injection.

Executive ViewAI

Why It Matters

Organizations using Atlassian Confluence Server face critical risk from CVE-2019-3396, a path traversal vulnerability rated CVSS 9.8. This could allow attackers to access or modify files outside intended directories, potentially exposing sensitive configuration or credentials. This vulnerability is actively exploited in the wild (KEV-listed) and requires immediate remediation. A patch is available and should be applied immediately given the critical severity.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Restrict file upload functionality via WAF; (2) Implement allowlist-based file type validation; (3) Use chroot/containerization to limit filesystem access.

Threat Intelligence Overview

Threat Score

9.8/10

Composite threat intelligence

EPSS Score

94.5%

Top 0% exploitable

Threat Intel

1 sources

Exploit

POC

Public exploit code exists

Data Quality

7 sources

Confidence: High

NVD

CVE.org

CISA KEV

EPSS POC (2) THREAT

Exploit-DB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV Yes

Public POC Yes

EPSS 94.5%

Patch available Yes

Active threat Yes

Deciding rule

In CISA KEV with patch available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.